IT puking snow in the NSW High Country, with the big ski resorts waking to a winter wonderland this morning. And it’s only Autumn.

Up to 20cm of snow in the Snowy Mountains overnight heralded Sydney’s first wintry blast for 2017: temperatures in the city dropped to 12C overnight, with the chill coming straight off the snow down south.

It’s two months until the official start of the ski season, but ski resorts in Victoria woke up to 20cm of snow, and this morning the dusting that had begun to cover the NSW Snowy Mountains had turned to full-on snowstorm.

It’s all come out of a cold front that moved through Victoria on Sunday morning sending temperatures plummeting and whipping up wild winds, torrential rain, and left Melbourne with flash flooding before heading into NSW.

The storm in Sydney on Sunday night left 900 people without power, and then a city shivering.

The cold is biting in the NSW Central and Southern Tablelands and the Southwest slopes, with a sheep graziers alert warning of cold temperatures, heavy rain and showers and strong south-westerly winds today.